Fix spec violations in edit_spec.js for vuejs migration

What does this MR do and why?

Resolves #413379 (closed)

Fixes jest spec violations in spec/frontend/snippets/components/edit_spec.js for vue3-migration

Screenshots or screen recordings

No visible change

How to set up and validate locally

1. Run yarn jest spec/frontend/snippets/components/edit_spec.js or check pipeline results

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #413379 (closed)